Aircraft Oxygen Systems

Question 1

What is the Percentage of gases that comprise the atmosphere?

Answer 1

21% Oxygen
78% Nitrogen
1% other gases

Question 2

The percentage of water vapor in the atmosphere rarely exceeds….

Answer 2

%5

Question 3

How is human circulation and respiration affected by flying?

Answer 3

High altitudes causes lower pressure going into the lungs and oxygen being absorbed in the bloodstream, causing Hypoxia.

Question 4

What is Hypoxia?

Answer 4

Lack of Oxygen to the human brain and body.

Question 5

What does the lack of oxygen do to the body and brain?

Answer 5

sluggish mental and physical functions of the body, May cause passing out and death.

Question 6

At what altitude does the oxygen in the bloodstream start to diminish?

Answer 6

@7,000 ft above sea level

Question 7

What causes hyperventilation(breathing to heavily)?

Answer 7

High levels of carbon dioxide in the bloodstream. Carbon dioxide regulates the intake of oxygen intake into the bloodstream.

Question 8

What is carbon monoxide poisoning how does it happen in flight?

Answer 8

Carbon monoxide gases come incomplete combustion of hydrocarbon fuels. If exhaust makes it into cabin thru malfunctions of manifolds.

Question 9

Why are cabins of high flying transport category ACFT Pressurized?

Answer 9

To provide Oxygen and Comfort to passengers.

Question 10

Oxygen leak check is checked using?

Answer 10

Oi-less Soap and Water

Question 11

List three methods Oxygen is Carried on aircraft.

Answer 11

Press Bottles, LOX, and Oxygen Generators(solid)

Question 12

As altitude increases atmospheric pressure …..

Answer 12

decreases

Question 13

What color are Oxygen bottles?

Answer 13

Green

Question 14

Aviation grade Oxygen is what percentage pure?

Answer 14

%99.5

Question 15

How are oxygen systems serviced?

Answer 15

Leak testing, with leak check fluid(soapy water free of oil), by blocking the flow

Question 16

Why should drainage of oxygen systems be done outside?

Answer 16

To avoid substances that may cause explosion or fire when combined with pure Oxygen

Question 17

How should an oxygen tank be drained and refilled?

Answer 17

Always follow manufacturers instructions . It should be done slowly to prevent overheating or explosion.

Question 18

What should be used to purge the Oxygen system of moisture?

Answer 18

Dry air and nitrogen can be used to blow through the system, But a final purge should be done with pure oxygen.

Question 19

What is LOX

Answer 19

Liquid Oxygen

Question 20

What is the purpose of chemical Oxygen(Solid) in a cabin?

Answer 20

Used in unpressurized aircraft, military planes, as a backup for pressurization. Not seen much in commercial aviation.

Question 21

What happens in case of depressurization in aircraft airliner?

Answer 21

Backup Oxygen generator system give passangers 10-20 minutes of Oxygen thru a mask. Plane drops to lower altitude.

Question 22

What are some devices used as carbon monoxide detectors?

Answer 22

Chemical tabs(stickers) that change colors. And electronic carbon monoxide detectors.